.mydiv{
    height:76px;
    width:76px;
    background-color:#ADD8E6;
    border-radius: 50%;
    text-align: center;
    line-height: 76px;
    font-size:22px;
    color:blue;
    margin-left:170px;
}

.div_rotate {
    -webkit-transition-property: -webkit-transform;
    -webkit-transition-duration: 1s;
    -moz-transition-property: -moz-transform;
    -moz-transition-duration: 1s;
    -webkit-animation: rotate 3s linear infinite;
    -moz-animation: rotate 3s linear infinite;
    -o-animation: rotate 3s linear infinite;
    animation: rotate 3s linear infinite;
}
@-webkit-keyframes rotate {
    from {
        -webkit-transform: rotate(0deg);
    }
    to {
        -webkit-transform: rotate(360deg);
    }
}
@-moz-keyframes rotate {
    from {
        -moz-transform: rotate(0deg);
    }
    to {
        -moz-transform: rotate(359deg);
    }
}
@-o-keyframes rotate {
    from {
        -o-transform: rotate(0deg);
    }
    to {
        -o-transform: rotate(359deg);
    }
}
@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(359deg);
    }
}